Refrigeration
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Refrigeration主讲嘉宾之一
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8月22日下午1：00—3：00，Refrigeration在北京国际会议中心305—A室会议室召开。第22届国际制冷大会于2007年8月21日在北京国际会议中心隆重召开，会议为来自世界各地的科学家和工程师提供一个互相交流和分享各自成功经验的机会，以使制冷技术在今后几十年保持持续快速的发展。
现场PPT演示
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演讲摘要：
In the paper,the temperature and pressure distributions of a new 3D simulating environment device with irregular configuration were investigated for the aim of structure optimization. Firstly,the three-dimensional heat and mass transfer characteristics of this device with basic design were analyzed using the standard k-ε turbulent model by numerical method. The simulation results revealed the deficiency on airflow flied and temperature and pressure distributions. Secondly,in order to get better temperature and pressure fields,the configuration of air diffusion part was optimized by further simulation. Adding static pressure chamber and air diffusion perforation plate,the temperature and pressure distributions were greatly improved,the temperature gradient decreased from 3 ℃ to 1℃,and the pressure gradient decreased to 0.5% of the former. Moreover,the air outlet velocity was investigated at different air diffusion perforation ratio. The further numerical results show that temperature and pressure fields can be greatly influenced by both perforation plate and air velocity. Increasing orifices on air diffusion perforations plate and decreasing air velocity are
more favorable to improve the airflow field,the temperature field and the pressure field of this device.
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